32 bit dll importing in 64 bit .Net application

Question

I\'m having a problem, I\'ve been trying to solve it since yesterday but no luck. I have a 32-bit Delphi DLL which I want to import it in to a .NET WIN Application. This ap

Answer 1

As I understand things, you have no way of using a 32-bit DLL from a 64-bit application. That said, you may compile your application for X86 only.

The solution you found may be about how to use a DLL that exists for both 32- and 64-bit versions in an "Any CPU"-compiled project depending on whether the application is running in a 32- or 64-bit environment.

To do that, you could write two wrapper DLLs in C#, one for 64-bit and one for 32-bit and use the respective wrapper depending on whether you're running on a 64-bit or 32-bit OS.

However, this does not work when all you have is a 32-bit DLL. A 64-bit application can not use 32-bit DLLs, as well as a 32-bit application can not use 64-bit DLLs.

So you either need to compile your application for 32-bit, or you have to create a 64-bit version of your DLL.